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In context with the industrial preparation of hydrogen from water gas \( \left(\mathrm{CO}+\mathrm{H}_{2}\right) \), which of the following is the correct statement ?
(a) \( \mathrm{CO} \) is removed by absorption is aqueous \( \mathrm{Cu}_{2} \mathrm{Cl}_{2} \) solution.
\( \mathrm{P} \)
(b) \( \mathrm{H}_{2} \) is removed through occlusion with \( \mathrm{Pd} \).
W
(c) \( \mathrm{CO} \) is Oxidized to \( \mathrm{CO}_{2} \) with steam in the presence of a catalyst, followed by absorption of \( \mathrm{CO}_{2} \) in alkali.
(d) \( \mathrm{CO} \) and \( \mathrm{H}_{2} \) are fractionally separated using differences in their densities.
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